How to Perform a Failback Takeover on a System That
Uses Oracle Data Guard Replication

Follow this procedure to restart an application on the original primary
cluster, cluster-paris, and to use the current data
on the original primary cluster.

Note –

Any updates that occurred on the standby cluster, cluster-newyork,
while it was acting as primary are discarded.

The failback procedures apply only to clusters in a partnership. You
need to perform the following procedure only once for each partnership.

Note –

Conditionally, you can resume using the data on the original primary cluster-paris.
However, you must not have replicated data from the new primary, cluster-newyork,
to the original primary cluster, cluster-paris, at
any point after the takeover operation on cluster-newyork.

Before You Begin

Before you begin the failback takeover procedure, the clusters must
have the following roles:

The protection group on cluster-newyork is
assigned the primary role.

The protection group on cluster-paris has
either the primary role or secondary role, depending on whether the protection
group was reached during the takeover.

If the original primary cluster, cluster-paris,
failed, confirm that the cluster is restarted and that the Sun Cluster Geographic Edition infrastructure
is enabled on the cluster.